ZIP code 79042 is in Happy (51% of residents), in Swisher County (56%), Randall County (37%), Castro County (3.6%) and Armstrong County (3.2%), Texas. 49% of its residents live outside city limits. It is in Texas's 19th congressional district (59%) and Texas's 13th congressional district (41%). Its state senate district is State Senate District 31; its state house districts are State House District 88 (59%) and State House District 86 (41%).
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
State legislative districts
State senate district
Share of ZIP residents
State Senate District 31
100%
State house district
Share of ZIP residents
State House District 88
59%
State House District 86
41%
Voting precincts
5 voting precincts overlap ZIP 79042.
Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:79042")
ZIP 79042 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code;
PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.